Here is one for a golden seed, but I don't know if it works or about who the client is or any of that stuff:
2YH44 HY3NWFT HRX55
N&HK0 C—9MF8 T2QPW
I've got two golden seed codes, here is the other one:
1H9MS %CP@R5J 45MX#
5%50F X=SNJR6 5@%X8
I have those two because my Lucario is at level 90 and I wanted it at level 100!

Hi, leo4liverpool
I see that Dark Lugia has not yet replied and I was just hoping I could help with some recruitment codes. Use them in their sets, I made it so you can take 8 Challenges at once and get 8 pokemon recruited at once:

Set 1:

For Kabuto:
#9CHW FQ8332H 9N69F
8%C&% &=9&1=+ PJH=%

For Charmander:
0#CP# HS9W&@X 9+51T
YC+H0 J0@P-NT #%#CM

For Magmar:
J2=FR W4SQ#8% -P3HJ
81X0P X=2PRT= KQ=%+

For Dratini:
FY+8Y 42-%R05 F997N
+T-74 Y=4&99C F0Y@5

For Riolu:
8XRY4 @M2T2-S PFY3J
JMPQJ &@FNFJC 4+00%

For Snover:
7K9@P QR9SC+2 1&FX6
J%83J H8H98T- SR2QT

For Tododile:
1J5F6 JM5JS#T 3FX5@
9QQPS &47P#0+ Y-QXH

Mew is not avaliable.

For Crobat:
=F=HK QY2T#X7 64#QW
W@&C5 Y&&7@2F 5&5#C

Set 2:

For Natu:
2F#+8 H8NHX1R Y7KXR
1FW-@ QM0R&C1 Q1=#6

For Togepi:
@X5&- Y&HN@YT F-YQW
RSK&5 S1F6K24 KW%WS

For Snubull:
=Y991 996%09S 308X5
N=QC7 RWPNY4W KWP-#

For Granbull:
H9C48 7#WQ%15 98WQF
Q4JJS HXQ7T74 90&@H

Teddiursa is not availiable

Diglett is not availiable. I heard you have to recruit him without a custom Wonder Mail. So in the field.

Shaymin is not availiable. You must recruit Shaymin on your own. I think its in a special Quest in the game. In Shaymin Village.

Arceus is not availiable. You cannot recruit Arceus in "Pokemon Mystery Dungeon: Explorers of Sky"

Giratina is unavailiable. You must recruit him on your own.

For Rotom:
1M9M5 N5PTS6J 4HXC#
SS6+= -=MN+R2 +X7Y7
(!NOTE! I don't know how to get more than one form, if you could figure this out then tell me)

Croagunk is not availiable. I can give you Toxicroak, though:
HM8TX @&31NCS Q2RHC
-F49T +N89-5Q 9Y&RF

Here is one from me, I don't even know what it is, just try it out:
Undefined:
K0XR4 #=#6%NY 88H6N
0HQCS 0H4761W FM&Q8